/Engine/Source/Runtime/Core/Public/Math/UnrealMathUtility.h
Interpolate Linear Color from Current to Target. Scaled by distance to Target, so it has a strong start speed and ease out.
static [FLinearColor](API\Runtime\Core\Math\FLinearColor) CInterpTo ( const [FLinearColor](API\Runtime\Core\Math\FLinearColor) & Current, const [FLinearColor](API\Runtime\Core\Math\FLinearColor) & Target, float DeltaTime, float InterpSpeed )